I break a lot of "dominance" rules. My dogs sleep on the bed and walk in front of me and play tug-of-war. Guess what, I'm still the leader. I've seen plenty of alpha wolves (I know they aren't dog) walking at a regular pace while the others walk in front or behind. They're paying attention to where the alpha is going. Human parents also. Little kids walk ahead or behind and still respect where the mom is going. As long as a dog knows and cares about its leader, it doesn't absolutely need to walk behind or be constantly shut down. I like my dogs to be relaxed and safe, and in turn they are obedient and loving.